Conveyer



INVENTOR. Francis H0 q l N all Oct. 27, 1936. F. HOG G CONVEYER Filed Dec/31, 1935 Patented Oct. 27, 1936 UNITED STATES CONVEYER Francis Hogg, Wesleyville, Pa., assignor to The Standard Stoker Company, Incorporated, a corporation of Delaware Application December 31, 1935, Serial No; 56,874 g 6 Claims.

This invention relates to conveyers in general but more particularly to fuel conveyers for use in stokers for-conveying fuel such as coal of mixed sizes from a source of supply and delivering it to a furnace.

The object of the invention is to provide a conveyer including afuel crusher and means for by-passing around the crusher fuel of a predetermined size, or, otherwise expressing it, fuel already of a size suitable for delivery to the furnace.

Other objects and the advantages of the invention will be apparent from the following description and the accompanying drawing, in

Fig. 1 is a central vertical longitudinal section through theconveyer of the invention;

Fig. 2 is 'a vertical transverse section through the conveyer taken rearward of the crusher in the line 22 of Fig. 1; and

Fig. 3 is a similar section taken forward of the crusher on the line 3-3 of Fig. 1.

For purposes of description the conveyer A of the invention is shown in position on a locomotive tender l0 for transferring fuel from the fuel bin |l thereof forwardly to the locomotive furnace (not shown). The tender is of conventional form having the plates 2 in the floor of the fuel bin slidable, as well known in the art,

to create a shiftable opening I 3 through which the fuel gravitates into the conveyer A.

The conveyer A comprises a conduit l4 consisting of a trough section I5 disposed beneath the slide plates l2 to receive fuel from the fuel bin through the shiftable opening l3 and a tubular section IS in axial alignment with the trough section and extending forwardly therefrom toward the locomotive. A screw rotatable in the conduit advances the fuel through the trough section and into and through the tubular section. At the junction of these sections a fuel crusher 20 is suitably mounted at one side of the screw l1. This crusher cooperates with the screw to break down or crush the larger lumps of fuel being advanced by the screw into the tubular section It.

Rearward of and adjacent to the crusher 20, the trough section I5 is apertured in its floor at 2|. The apertured floor in effect constitutes a grid or riddle permitting fuel of a predetermined size or the fuel already of a size suitable for delivery to the furnace to pass through and to retain in the trough section fuel of a size larger than the apertures or openings 2|.

A casing 22 rigid with the conduit l4 receives the fuel that falls through the openings 2|. The casing is disposed lengthwise of the conduit and extends from the rear end of the elongated openings 2| of the trough section to the opening 23 in the bottom side of the tubular section for- 5 the screw H. 15

Any suitable drive mechanism may be employed for driving the screws I1 and 24 from their rearward ends including the gearing 25 and a clutch26 shiftable to render thescrew 24 inoperative during operation of the screw ll.

Those familiar with stokers will recognize that by-passing fuel already of a suitable size for delivery to the furnace from the trough section of the conduit around the crusher into the tubular section of the conduit decreases the undesir- 5 able breakdown or crushing of such fuel.

I claim:

1. In a conveyer for transferring fuel of mixed sizes from a source of supply, the combination of a conduit, a screw rotatable in the conduit for 30 advancing fuel therethrough, a crusher in said conduit intermediate the ends thereof disposed at a side of said screw, said conduit having an opening in its floor rearward of said crusher permitting fuel of a size smaller than the opening 35 to pass therethrough and retaining in the conduit fuel of a size larger than the opening, said screw and crusher cooperating to crush the fuel retained in the conduit, and means beneath said opening receiving the fuel passing therethrough 40 and by-passing the same around said crusher and delivering such fuel into the conduit forward of the crusher.

2. In a conveyer for transferring fuel of mixed sizes from a source of supply, the combination of 45 a conduit, a screw rotatable in the conduit for advancing fuel therethrough, a crusher in said conduit intermediate the ends thereof disposed at a side of said screw, said conduit having an opening in its floor rearward of said crusher per- 50 mitting fuel of a size smaller than the opening to pass therethrough and retaining in the conduit fuel of a size larger than the opening, said screw and crusher cooperating to crush the fuel retained in the conduit, and a screw conveyer 55 Thus the fuel from the 0 beneath said opening receiving the fuel passing therethrough and by-passing the same around said crusher and delivering such fuel into the conduit forward of the crusher.

3. In a conveyer for transferring fuel of mixed sizes from a source of supply, the combination of a conduit, a screw rotatable in the conduit for advancing fuel therethrough, a crusher in said conduit intermediate the ends thereof disposed at a side of said screw, said conduit having an opening in its floor rearward of said crusher permitting fuel of a size smaller than the opening to pass therethrough and retaining in the conduit fuel of a size larger than the opening, said screw and crusher cooperating to crush the fuel retained in the conduit, and a screw conveyer beneath said opening receiving the fuel passing therethrough and by-passing the same around said crusher and delivering such fuel into the conduit forward of the crusher, said screw conveyer comprising a casing secured to said conduit and a screw rotatable in said casing.

4. In a conveyer for transferring fuel of mixed sizes from a source of supply, the combination of a conduit, a screw rotatable in the conduit for advancing fuel therethrough, a crusher in said conduit intermediate the ends thereof disposed at a side of said screw, said conduit having an opening in its floor rearward of said crusher permitting fuel of a size smaller than the opening to pass therethrough and retaining in the conduit fuel of a size larger than the opening, said screw and crusher cooperating to crush the fuel retained in the conduit, and a screw conveyer beneath said opening receiving the fuel passing therethrough and by-passing the same around said crusher and delivering such fuel into the conduit forward of the crusher, said screw conveyer comprising a casing secured to said conduit and a screw rotatable in said casing, and driving mechanism for said screws including a clutch shiftable to render the second named screw inoperative during operation of the first named screw.

5. In a conveyer for transferring fuel of mixed sizes from a source of supply, the combination of a conduit, a screw rotatable in the conduit for advancing fuel therethrough, a crusher in said conduit intermediate the ends thereof disposed at a side of said screw, said conduit having an opening in its floor rearward of said crusher permitting fuel of a size smaller than the opening to pass therethrough and retaining in the conduit fuel of a size larger than the opening, said screw and crusher cooperating to crush the fuel retained in the conduit, means beneath said opening receiving the fuel passing therethrough and bypassing the same around said crusher and delivering such fuel into the conduit forward of the crusher, and means rendering the aforesaid means inoperative during operation of said screw.

6. In a conveyer for transferring fuel of mixed sizes from a source of supply, the combination of a conduit comprising a trough section and a tubular section in axial alignment, a screw rotatable in the conduit for advancing fuel through the trough section into and through the tubular section, a crusher in said conduit at the junction of said sections at a side of said screw, said trough section having an opening in its floor rearward of said crusher permitting fuel of a size smaller than the opening to pass therethrough and retaining in the trough section fuel of a size larger than the opening, said screw and crusher cooperating to crush the fuel retained in the trough section, and means beneath said opening receiving the fuel passing therethrough and bypassing the same around said crusher and delivering such fuel into said tubular section forward of the crusher.

FRANCIS HOGG. 

